When do most people quit their job before matriculation?

Well, there is something I think we all agree on; You have in no way promised them in the application that you will continue working after receiving the admission offer. You were only asked about how much work experience you anticipate to have upon matriculation. Anticipation is not something you get caught for, at least not in the world we live in. However, I think you should double check and ask some people that know the real answer. If I were you, I would not ask the admission folks in your school as it may shift their focus on that small bad thing. Probably dropping an admission consultant an email may be the right thing. Some of them answer admission-related questions for anyone.